you just have more active sites and the polymerization process is statistical. therefore, it is possible to get lower Mw's because a bigger quantities of reactions are taking place simultaneously. in that case, the polydispersity should be higher as well.

Dear all, the main reason is the reduced diffusion due to the high and rapid viscosity build-up. My Regards

Hi;

Below you will find the answer to your question:

Effect of increasing NCO/OH molar ratio on the physicomechanical and thermal properties of isocyanate terminated polyurethane prepolymer.

DOI: •10.14419/ijbas.v3i2.2416.

Best regards

Thank you very much for your answers.

Best regards